Parousia

 "The bottom line is that the Bible does not formally assert the precise time of the Second Coming. Although we find indications of what individual apostles expected concerning the matter, Benedict understands that for them this was 'ultimately a secondary consideration.' Whether they thought the world was going to end within a day or a decade or a millennium, he tells us that the 'essential point' they were asserting concerned the need for spiritual preparation, for mission, and for endurance in the face of persecution. It turns out that these are realities that must govern Christians’ lives regardless of the epoch in which they live and how much time remains in their earthly pilgrimage." -Matthew Ramage, from his treatise on the biblical exegesis of Ratzinger on eschatology and the problem of imminent parousia

The Church must always spiritually prepare for the End, focus on the Mission, and endure persecution virtuously and will always be doing so, no matter how many continents it reaches in the meanwhile. 

The Pope (Ratzinger) then goes on to say that, in the meanwhile, we have the adventus medius of the Eucharist; the way in which Christ comes to us currently is through Sacrament, namely through Liturgy.